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Finding the Fourth Proportional to 304.83, 457.35 and 140.40

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Solution

The fourth proportional to 304.83, 457.35 and 140.40 is: 210.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.83 : 457.35 = 140.40 : x
  2. Step 2: Convert to fraction form
    304.83/457.35 = 140.40/x
  3. Step 3: Cross multiply
    304.83x = 457.35 × 140.40
  4. Step 4: Simplify right side
    304.83x = 64,211.94
  5. Step 5: Solve for x
    x = 64,211.94/304.83
  6. Step 6: Final answer
    x = 210.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.